Cisco Systems ISR4451XK9 manual Installing a Dimm, Dimm Showing Polarization Notch

Chapter 6 Installing and Upgrading Internal Modules and FRUs

Installing and Removing DDR DIMMs

Installing a DIMM

Note Unregistered DIMMS (UDIMMs) and very low profile (VLP) RDIMMs are not interchangeable.

Follow these steps to install a DIMM:

Step 1 Read the “Safety Warnings” section on page 6-2section and disconnect the power supply before you perform any module replacement.

Step 2 Remove the chassis cover. For the Cisco ISR 4451-Xs, see the “Removing and Replacing the Chassis Cover” section on page 6-4.

Step 3 Locate the DIMM module. See the “Locating Internal and External Slots for Modules” section on page 6-5to find the DIMM sockets on the router.

Step 4 Make sure that both latches on the DIMM connector are in the open position.

Step 5 Orient the DIMM so that the polarization notch lines up with the polarization key on the connector. See Figure 6-16.

Caution DIMMs and PVDM4s plug into similarly sized sockets. Only the polarization notch differs. Look for the polarization notch shown in Figure 6-16before inserting a DIMM in the socket.

Figure 6-16 DIMM Showing Polarization Notch

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Step 6 Insert the DIMM into the connector one side at a time. Figure 6-17shows what not to do while handling a DIMM.

	Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01		6-21